Arsenic, Inorganic

Requirements for Respiratory Protection for Inorganic Arsenic Particulate-Except for Those With Significant Vapor Pressure.

Half-mask respirators shall not be used for protection against arsenic trichloride, as it is rapidly absorbed through the skin.

**A high-efficiency filter means a filter that is at least 99.97% efficient against mono-disperesed particles of 0.3 µm (micrometers) in diameter or higher.